Variable speed drives for low-power motors

WEG has launched a series of compact variable speed drives (VSDs) to enhance energy efficiency in applications requiring low motor power. Designed to drive motors with power from 180W to 4kW, the CFW300 series is suited for relatively small machinery such as centrifugal and metering pumps, fans and ventilators, stirrers and mixers, extruders, roller conveyors, cutting machines and rotary filters.

The CFW300 features an integrated micro PLC and a user-friendly control panel with LCD display. Installation is also said to be easy thanks to plug-and-play extension modules.

The CFW300 has two slots for extension modules - one for communication and the other for a variety of I/O modules.This enables users to integrate RS485 or RS232 interfaces and use Modbus RTU, Bluetooth or USB communication protocols. The VSD can also be connected to fieldbus systems such as Profibus DP, CANopen or DeviceNet, or configured for operation under remote control. An Ethernet IP interface is also available.

Designed to operate at ambient temperatures up to 50°C without derating, the CFW300 is equipped with independently acting, integrated thermal protection functions for the motor and the drive. In addition, the drive has varnished circuit boards for enhanced corrosion resistance, which contributes to longer service life, while an optional flash memory card enables optimal storage and convenient loading of parameter data sets.

The CFW300 is available in frame size A for rated power from 180W to 1.5kW and frame size B for rated power from 2.2 to 4kW.